Table 3.

Multiple regression analysis between socioeconomic, demographic and lifestyle indicators and the BMI of individuals of all ages.

Multiple Regression
Adjustment 1: all age groups
	Coefficient	CI 95%	Statistics t	p-Value
Intercept	16.41	16.41 ± 0.71	22.95	>0.0000 *
Schooling	3.21	3.21 ± 0.36	8.83	>0.0000 *
Income	0.25 × 10−3	0.25 × 10−3 ± 0.09× 10−3	2.95	0.0032 *
Sex	2.96	2.96 ± 0.38	7.69	>0.0000 *
Physical activity	0.92	0.92 ± 0.43	2.12	0.0344 *
Adjustment 2: 0 to 9 years
	Coefficient	CI 95%	Statistics t	p-Value
Intercept	17.4	17.4 ± 0.7	24.65	>0.0000 *
Schooling	−0.09	−0.09 ± 0.44	−0.20	0.8410
Income	0.03 × 10−3	0.03 × 10−3 ± 0.13 × 10−3	0.24	0.8140
Sex	−0.58	−0.58 ± 0.41	−1.39	0.1660
Physical activity	0.03	0.03 ± 0.71	0.04	0.9650
Adjustment 3: 10 to 19 years
	Coefficient	CI 95%	Statistics t	p-Value
Intercept	18.33	18.33 ± 1.18	15.52	>0.0000 *
Schooling	0.9	0.9 ± 0.64	1.39	0.1650
Income	0.17 × 10−3	0.17 × 10−3 ± 0.15 × 10−3	1.13	0.2590
Sex	0.91	0.91 ± 0.65	1.39	0.1670
Physical activity	1.11	1.11 ± 0.71	1.57	0.1118
Adjustment 4: 20 to 59 years
	Coefficient	CI 95%	Statistics t	p-Value
Intercept	22.91	22.91 ± 1.30	17.56	>0.0000 *
Schooling	2.48	2.48 ± 0.51	4.89	>0.0000 *
Income	0.00	0.00 ± 0.12 × 10−3	0.01	0.9946
Sex	1.10	1.10 ± 0.64	1.72	0.0866
Physical activity	−0.42	−0.42 ± 0.61	−0.70	0.4857
Smoking	−0.29	0.29 ± 0.7	−0.43	0.6662
Alcohol consumption	1.02	1.02 ± 1.89	0.54	0.5897
Adjustment 5: 60 years or older
	Coefficient	CI 95%	Statistics t	p-Value
Intercept	23.81	23.81 ± 1.61	14.75	>0.0000 *
Schooling	1.51	1.51 ± 0.78	1.93	0.0552
Income	0.13 × 10−3	0.13 × 10−3 ± 0.16 × 10−3	0.00	0.3962
Sex	1.72	1.72 ± 0.81	2.11	0.0362 *
Physical activity	−0.35	−0.35 ± 0.80	−0.45	0.6569
Smoking	−1.35	−1.35 ± 1.26	−1.07	0.2880
Alcohol consumption	−0.91	−0.91 ± 1.29	−0.71	0.4807

Note: * p < 0.05.